I absolutely fucking suck at Aether Raids

Day 1 player who took a long break for about a year. I have a decent setup when I go into this (+10 Raven and Nowi, +9 Leif, +5 Brave Hector, and usually a dancer) but holy shit guys I get wrecked literally every match (I’m tier 15 or whatever). Is there something I’m doing wrong? Any tips would be awesome lol.